got an 02 TLS 70k, CEL, vsa, and the triangle with the ! in it came on at the same time drove it for alil and the vsa and trianle went out now just the cel is on. took it to autozone got it scanned they pulled 2 codes P1070,P1072. can anyone shed some light on this for me im thinking its an o2 sensor but not sure how to narrow it down, any help would be appreciated .

 

i would take it 2 da dealer.

 

are you sure you got the codes right? there is no 1070, 1072

 

^^That's what I was gonna say. I think they start at like P1106

 

oh my bad there P0170, P0172

 

P0170 Fuel Trim Malfunction (Bank 1)
P0172 System too Rich (Bank 1)

Definitely O2 Sensor but I couldn't tell you which one is bad. Maybe someone else knows.

 

are both o2 sensors the same?

 

No, they aren't the same. See below or you can check this site.



18 36531-P8D-J21 SENSOR, OXYGEN 1 2002 TL 104.23 78.17 Qty:
19 36532-P8D-J01 SENSOR, RR. OXYGEN 1 2002 TL 113.31 84.98 Qty:

 

These are the directions per the manual, before spending any money replacing parts

First have the fuel pressure tested. is it too high or too low?

then test the Primary O2 (the the first one, not by the cat) what are the values. Does it stay at less than 0.3v or more than 0.6? yes replace the O2 if no

test the EVAP canister purge valve with a vacuum pump from the intake manifold side

 

ok heres a dumb question how would one check the voltage on the first o2 sensor just straight up prob the wires?

 

In short a scan tool that reads live data, You have to reset the ECU, start teh car, hold the RPM at 3000 rpm with no load till the radiator fan comes on (in park or neutral) check the Primary HO2S (sensor 1) With the scan tool. Does it stay at less than 0.3 or more than 0.6V
Yes replace the sensor.

No thats when you need to vacuum test teh evap

 

yea thats wat i thought figured i could avoid that 100 diag from the dealer thanks again

 

Many autoparts stores have them. Call around and ask if they have a scan tool that they can read live data with